NullPointerException in org.jboss.varia.scheduler.XMLScheduleProvider and org.jboss.varia.scheduler.DBScheduleProvider when calling stopProviding ------------------------------------------------------------------------------------------------------------------------------------------------- Key: JBAS-6312 URL: https://jira.jboss.org/jira/browse/JBAS-6312 Project: JBoss Application Server Issue Type: Bug Security Level: Public (Everyone can see) Reporter: Adam Bonkowski Priority: Minor When calling stopProviding more than once in these classes (for example deploying MBean, stopProviding(), startProviding(), undeploying MBean) a NullPointerException occurs. Example stack trace: javax.management.RuntimeMBeanException at org.jboss.mx.interceptor.ReflectedDispatcher.handleInvocationExceptions(ReflectedDispatcher.java:176) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:163) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.varia.scheduler.AbstractScheduleProvider.stopScheduleProviderService(AbstractScheduleProvider.java:227) at org.jboss.varia.scheduler.AbstractScheduleProvider.stopService(AbstractScheduleProvider.java:202) at org.jboss.system.ServiceMBeanSupport.jbossInternalStop(ServiceMBeanSupport.java:315) at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:247) at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978) at $Proxy0.stop(Unknown Source) at org.jboss.system.ServiceController.stop(ServiceController.java:508) at sun.reflect.GeneratedMethodAccessor112.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) at $Proxy4.stop(Unknown Source) at org.jboss.deployment.SARDeployer.stop(SARDeployer.java:336) at org.jboss.deployment.MainDeployer.stop(MainDeployer.java:667) at org.jboss.deployment.MainDeployer.undeploy(MainDeployer.java:638) at org.jboss.deployment.MainDeployer.undeploy(MainDeployer.java:632) at org.jboss.deployment.MainDeployer.undeploy(MainDeployer.java:615) at sun.reflect.GeneratedMethodAccessor132.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) at $Proxy9.undeploy(Unknown Source) at org.jboss.deployment.scanner.URLDeploymentScanner.undeploy(URLDeploymentScanner.java:450) at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:570) at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:263) at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.loop(AbstractDeploymentScanner.java:274) at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:225) Caused by: javax.management.RuntimeMBeanException at org.jboss.mx.interceptor.ReflectedDispatcher.handleInvocationExceptions(ReflectedDispatcher.java:176) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:163) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.varia.scheduler.ScheduleManager.unregisterProvider(ScheduleManager.java:242) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) ... 52 more Caused by: javax.management.RuntimeMBeanException at org.jboss.mx.interceptor.ReflectedDispatcher.handleInvocationExceptions(ReflectedDispatcher.java:176) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:163) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.varia.scheduler.AbstractScheduleProvider.removeSchedule(AbstractScheduleProvider.java:163) at org.jboss.varia.scheduler.XMLScheduleProvider.stopProviding(XMLScheduleProvider.java:239) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) ... 62 more Caused by: java.lang.NullPointerException at org.jboss.varia.scheduler.ScheduleManager.removeSchedule(ScheduleManager.java:332) at sun.reflect.GeneratedMethodAccessor153.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) ... 73 more Looking at the implementation: /** * Stops the Provider from providing causing * the provider to remove the Schedule * * @jmx:managed-operation */ public void stopProviding() { Iterator i = mIDList.iterator(); while( i.hasNext() ) { Integer lID = (Integer) i.next(); try { removeSchedule( lID.intValue() ); } catch( JMException jme ) { log.error( "Could not remove Schedule in stop providing", jme ); } } } it seems to lack i.remove() while iterating. During next stopProviding() call a non-existing schedule is being removed and NullPointerException is thrown. As a result no further schedules are removed. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira